Carbureter.



T. F. BOURNE.

CA'RBURETER.

APPLICATRON FILED JULY 31 um.

Patented Nov. 2, 1915.

WITNESSES are,

THEODORE r. sounun, or MON'ICLAIR, NEW annsn'iz,

GARBURETER.

masses.

To all whom it may concern Be it known that I, THEODORE F. BOURNE, a citizen of'the United States, and resident of Montclair, Essex county, New Jersey, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

' then pointed out in the claims.

Reference is to be had to the accompanying drawings wherein,

Figure l is a vertical section of a carbureter embodying my invention; Fig. 2 is a substantially horizontal section taken through the several air passages; Fig. 3 is a section on the line 3,3, in Fig. 2; Fig. 4 is a detail xiew of the air valve shell, and Fig. is a detail illustrating means for controlling the needle valve for starting, etc.

In the accompanying drawings the carbureter casing has a carbureting or mixing chamber 1, shown provided with a suitable throttle valve 2, and having a main air inlet opening or passage At 4 is a passage for liquid fuel that leads into the carbureting chamber from. a source of fuel supply, such as a constant-level fuel bowl or chamber 5, shown having a float 6 and inlet controlling valves 7, to maintain the fuel level (0;) as required, which may be arranged. in any suitable manner. At 8 are air supply passages leading into the carlnuieting chamber,

and. communicating by means of jets or nozzles 9 within the carbureting chamber with the fuel supply passage at. The air passages 8 are shown opening through the wall of carbursting chamber 1, and inclined upwardly and inwardly therein at a suitable angle, and said passages S are shown arranged circularly and spaced apart to permit air from V theinlet 3 to-fiow in divided streams past said-passages, to mingle with the mixture produced in the passages 8 It will be noted that the single passage 4 supplies fuel to a Specification of Letters Patent.

plurality of jets 9, which jets branch outwardly and upwardly from passage 4: to the an passages 8. VVhilethe jets 9 may be of definite or set dimensions yet in order to enable the control of the flow of fuel from passage 4: to the jets 9, I have shownaneedle.

valve 10 to control passage ibelowtl1e'cOI munication therewith. of the jets 9. The needle valve 10 is shown passingthrough a suitable bore 10 in the carbureting chamber that is connected with passage 4. The casing is illustrated as provided with a lower portion l with which the passage 4, branch jets 9, and air passages 8 are cast integrally, and with an upper portion 1 suitably -se cured to the lower portion 1 I joint of the parts 1 1 being so disposed as to enable ready drilling of the passages 8 and jets 9. A band a surrounding the earbureting chamber may be adjusted upuor down, and may be held ,in set position by screw 6, whereby theadmission ,of-air into the passages 8 may be controlled. Y With the construction set forth the needle valve may be set to permit the required amount of fuel to flow to the several jets 9, and during operation of-the engine the suc tion therefrom will cause air to flow th-rough the passages 8 and carry liquid fuel therewith from the respective jets 9, thereby producing independent streams of relatively rich mixture in each passage, :which mixtures flowing through the upper orifices of said passages 8 into the carbureting chamber will be mixed or diluted therein withair entering the carbureting chamber from below, or through inlet 3, such air beingjdivided into various streams or portions as it, passes between several passages 8 and thfe'branch, jets 9 whereby the liquid fuel is finely vaporized and an ultimate mixture of fine quality: is produced. As the single needle 10 controls the supply of liquid fuel to the several jets 9, a simple means is providedfor controlling the flow from the several jetswithout-requiring each jet to be separately controlled, thus producing uniformity in the jet supply to the carbureting chamber 1 While the air entering zthe i carlmljet'er, through the inlet 3, may be controlled in any suitable manner, I have-'shown.ineans-yfor adjusting and regulating, at will, \"the amount of primary or main-air admitted, together with a valve for automatically controlling the inflow of further or auxiliary air, To this end I provide a shell ori.cage'- PatentedNoinQ, 31915. Application filcdJulySl, 1914. Seria1No 854,238. I:

the meeting opening 11 adapted. to register with an air opening in the wall of the casing, shown at 14c, and the lower edge portion of the wall portion ll" of such shell or cage below the opening 11 is shown adapted to a'egister with an air opening in the casing, shown at- 15, the lower edge of shell 11 being adapted to be adjusted toward and from a. wall 1 of the casing. Between opening 11 and the lower open portion of shell or cage'll the latter has a valve seat 16, and at 17 is a valve adapted to said seat and shown mounted to slide upon an adjustable stem or rod 18 having threads 18 engaging threads 19 that are upon the closiue ll, whereby said stem may be adjusted. Valve 17 may be made of leather or other suitable material. A. spring 20 upon said stein, between said valve and a stop 21 on said stem, maintains the valve normally closed. From this it will be understood that the shell or cage carrying the valve may be adjusted rel atively to opening 15 and Wall 1 to admit the desired amount of main or primary air into the carbureting chamber according to the requirements of the engine, and that valve 17 will open more or less to admit further or auxiliary air as required. It will be understood that when shell or cage 11 is adjusted the setting of the spring tension against valve 1? is independent oi'such adjustment. The opening 14% with respect to the opening 11. of shell 11 is such as to always supply the full amount ofair' for the opening 11" ivhen shell 11 adjusted up or down with respect to opening 15. The part 1 of the casing wall may beoiuitted, thus combining the-openings 14. and 15 in one opening. arrangement described enables connection to bev made through an inlet fitting 22 on the main casing for the supply of heated air through the inlet opening when desired. Shell or cage 11 may be held in set position by a screw l1 carried by the casing.

While the needle valve 10 be arranged in an ordinary manner, I have, in the accompanying drawings, shown. said valve 10 provided with threads 1O meshing with threads in a member or plug 24, that is slidable in a boreprovided in an .eX- tension or stem 25 projecting from the easing and in which the loci-e10 is partially located. Tie member or plug 24-. may be lcept from rotation in extension 25 by means of a pin 26 projecting from said plug and "'sl-idablo in a slot 27 in extension 25', and at 28 is an arm or lever shown pivotally car--' ried by the carburetor, at and provided With a suitable slot 30 receiving pin 26, said The lever being retained in set position by a spring, shown at 31, suitably connecting said lever with the casing. With this aroriginal set position without changing the position of the valve with relation to its plug 2%, since normally said plug may rest upon the bottom of the bore The needle valve and the means to vary its position without changing its setting in its supportng member or plug 2% are independent of the throttle. A look nut upon valve l0 may be provided to retain the same set upon member or plug 24:.

While I have illustrated the air passages S and fuel jets 9 as/cast integrally with the c: sing, it will be understood that said passages and jets may be cast or formed separately and secured to the casing, preferably to the walls thereof, by solder, in which case passage 4 may also be cast integrally with the jets 9 and suitably connected with the constant-level fuel supply chamber.

@hanges may be made in the details of construction and arrangement of parts set forth, as the same may be varied, within v the scope of the appended claims, without departing from the spirit of the invention.

Having now described my invention what I claim is 1. A carburetor comprising a carburctiug chamber, a plurality of air passages therein and spaced apart for the passage of air between the same within said chamber, and a ljuel supply passage having a. plurality ol jets communicating with said air passages respectively.

2. A carburetor comprising a carburcting chamber, a. plurality of air passages spaced apart within said chamber and extending :iwardly and upwardly thercinto and opening at their intake ends to atmosphere through the Wall of said chamber and permitting the How of air between certain of said passages, a plurality of jets within said chamber and communicating respectively with said air passages, and means to supply liquid fuel to said jets.

3. A carburetor comprising a carbureting chamber, a plurality oft air passages spaced apart within said chamber and extending inwardly thereinto and communicating at their intake ends with atmosphere and permlttingthe flow of am through said chamber between certam of said passages, a plurality of jets extending outwardly within said chamber and communicating respectively with said air passages between their inlet and outlet orifices, and a passage for liquid fuel communicating with said jets.

4. A carbureter comprising a carbureting chamber, a plurality of air passages inclining upwardly and substantially tlaIlSiQl'SGlY therein and open to atmosphere at their outer ends, a plurality of jets within said chamber inclined upwardly and outwardly and communicating respectively with said air passages, the air passages and jets being respectively spaced apart permitting the flow of air between the same, and a liquid fuel passage entering said chamber and communicating with said jets at their inner portions.

5. A carbureter comprising a carbureting chamber, a plurality of air passages circularly disposed within said chamber and spaced apart for the passage of air between and past the ends of said passages, a plurality of jets circularly disposed within said chamber and spaced apart below said air passages, said jets communicating at their outer ends with said air passages respectively, a constant level fuel supply source, and a passage connecting the latter with said jets, said last named passage extending within said chamber below said jets and passages permitting the flow of air past the same.

6. A carbureter comprising a casing hav ing a portion provided with a plurality of air passages therein, a plurality of jets communicating with said passages, said jets and passages being spaced apart to permit air to pass between the same, said casing having a portion above said passages secured thereto, and a throttle valve carried by the casing above said passages and jets.

7. A carbureter. having a carbu-reting chamber and provided with a plurality of air passages spaced. apart within said chamber to permit the flow of air between certain of said passages within said chamber, the

inner discharge orifices of said passages terminating within said chamber in spaced relation for the flow of air past the same,- a plurality of fuel jets leading to said passages respectively between their inlets and outlets, and means to supply fuel to said jets.

8. A carbureter comprising a carbureting chamber having an air inlet and a mixture outlet, a plurality of air passages spaced apart within said chamber between said in let and outlet permitting the flow of air between said passages within said chamber, said passages having air inlets, and having mixture orifices within said chamber, and

means to supply liquid to said air passages.

9. A carbureter comprising a carbureting municating with atmosphere through the' wall of the chamber and having mixture orifices within said chamber, a plurality of .liquid fuel jets communicating respectively with said passages, and a fuel passage comirulnicating with said jets.

10. A carbureter having a chamber, a plurality of air passages spaced apart within said chamber and having exit orifices spaced apart within and at a distance from the wall of said chamber, permitting the flow of air between said passages and orifices, liquid fuel jets spaced apart within said chamber permitting the flow of air between said jets and respectively communicating with said air passages, and a fuel supply passage within said chamber disposed between and communicating with said fuel jets.

11. A carbureter comprising a chamber having an air inlet and a mixture outlet, a plurality of air passages spaced apart with in said chamber providing spaces therebetween permitting the flow of air between said passages, said passages communicating with atmosphere through a wall of said chamber and having exit orifices spaced apart within said chamber between said inlet an'doutlet, liquid fuel jets communicating with said air passages, afuel supply passage communicating with said fuel jets, and means to regulate the flow of air through said air inlet to control the flow of air within said chamber past said eXit orifices of said air passages and between the latter.

12. A carbureter having a chamber, a plurality of air passages spaced apart within said chamber and opening at'their intake ends through a wall of said chamber, said passages having their outlet orifices spaced apart within said chamber at a distance from the wall of the chamber, a plurality of jets communicating with said passages respectively, means to supply liquid fuel to said jets, and a band surrounding said chamberarranged to be adjusted relatively to said inlet ends of said air passages to control the THEODORE F. BOURNE.

lVitnesses: I

MARIE F. lVArmuGrrr,- 'RALPH- H. RAPHAEL. 

